Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1985-09-04
1987-12-01
Edlow, Martin H.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
357 46, 357 40, 357 43, 307300, 307290, 307359, 307360, 307455, 307495, H01L 2702, H03K 333, H03K 5153, H03K 1920
Patent
active
047107936
ABSTRACT:
A differential amplifier operated as a voltage comparator includes first and second transistors coupled to first and second inputs respectively of the comparator whereby an applied input signal produces output transitions at an output of the differential amplifier as the input signal passes through and exceeds a first threshold voltage established at the second input of the differential amplifier. A hysteresis producing circuit is coupled to the differential amplifier which is responsive to the applied input signal exceeding the first threshold voltage for establishing a second threshold voltage, which is less than the first threshold voltage, whereby the input signal has to decrease below the value of the first threshold voltage to the second threshold voltage in order for the differential amplifier to switch back to its original operating state wherein hysteresis is established. A P-collector region is provided that is responsive to the second transistor of the differential amplifier being driven into saturation for collecting the saturation current thereof to inhibit this current from being injected into the substrate of the integrated circuit in which the voltage comparator is realized.
REFERENCES:
patent: 3676714 (1972-07-01), Wensink
patent: 4104547 (1978-08-01), Frederiksen
patent: 4375598 (1983-03-01), Sakai
Bingham Michael D.
Edlow Martin H.
Featherstone Don
Motorola Inc.
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